Telephone ringer



1952 G. w. scHoMAKER 2,6075833 TELEPHONE- RINGER- Filed Dec. 18, 1947 "FIG. 2

JNVENTQR] GEORGE w. SGHOMAKER 0 4 a 45mm 2 2.52042 Mm ATTORNQEY and} cleim's; *whe'mcensideredffim-coriuectiom t he drawing ;in whicht is-attached 1 al ojhemermadefoimagne material Patented Aug. 19, 1952 .7 c51 5 umpi e r c la ly 'ertams to devices ofthiskindtcommonlyjlnown gs teleplpne'r neersa ope a etifr n 'i elfieizice"e,

r member 18, 1 ,141; S na-mm sea-me 7 other; .kB racket L1 isrsecuredftof.yoke,= l 5..".by sc1tews I-9I and.fZ'0; thusi 'forih'ingan: enclosuredefi'ned by therinsidensurfacelof yoke l.5.and.lthe inside. .bottom surface, vof bracket? L ."The r longer upright 'Ifnefpurofoseoffthepreseut 'inuentiohfis toqfiilo 5 portion of bracket 1 'is secured tob'mcket ZZgnear "vide a rihgerjfot improved?constructionfwhich' will ,be simple Iodnamifa ziture; which can-"be Id accurately j em e iwh wi l, be e tign a wln'mh wigrl e relatively seam: and; "refl t or iin- 'costq" fOt-her ieetures and advanteges'i off tllefimthtiony will -'acpgear flfomithedetailed description "surfa'e end extending-downward etlfiht' ngles pain-- mag- "portion wlhich extends-downward"throughi holes '2 l? (see-:Fi'gr: 37 ml the: yoke, =thesefthi'eelded ends b'ein g held in place by means--of -huts IB Ksee-"Eig.

v Toithe' hpper ends of mag-netid coils- 2 3" and 24 at extension 22a; afibracket 22,;which is *mede o a-"m'agne'tic meter-lat Mounted 'On is at least"onQ gohg-and- "preferably its upper end by means of screw'lfir;

. R ockeblysupportedl adj acentgtothelower ends oiLthecoreS oi coils. 2V3 .andh iflhi'soan.elongated armaturefie Aqma gneticrcircuit thusuexists fiiom 1Q: thercore,ofhcoil;23,"throughrb1facket.22, the core ijgal opjectfofjthe' present invention of coil, anrairugapharmature-.9;;alnd a. second air. gap, torther coneloi coil.. 23.c Aetrikenlfl. is mounted, on armature .9; it, extends upward. in ,such (a, direction thatweight. 2'!'onit'supmr end 5 islpositionedlto strike gongs25f and.26; Armawith ualtfthat'l ii'gsr 1"and2jofthedmwings represent 25 the parts have been verticallyfl displaced" to" show their relative locations. 11 assemb1ingj, heqfollowing parts are stacked in the Lfoll'owingj order from-"bottom to-top; bracket 1, bottom p1a-tef5, permanent" magnet "l reed 26'; and top 1 plate 3.

" yoke has across-section-inthe-shapeoffeimlip- ,?errnanent--magnet l", ."'D OV de' w t-"o portions-P2," and thef'otherparts enumeratefdare flCh pIOVid d" withhol'e's, those-in ree di zfifieing desigriated'by'referencenumemls and 17110 86 in bracket .1 by reference numeral- 536:; -Themlioles' 6 ar'e-tappedi Ins-assembly; the holesjn parts 3,

,26-a,-n':1-5 and the cut-outportions Ziof ma'grlxe't I are" aligned'ywith. holesyfi. When this" is-done, 'ynon' magnetic screws; p referalqly 'fo fgbras ere passed downward through .the holes "and.1ctilteo'ut 40 portibnsZ; andare then tightened in tapped holes "6"to secure the partsrigidly together.

Next," armaturiegtliisdsecured"to. reedQZBT through memhersinQthe top-tebottom orderrenumera'te'd:

two, as indicated inFigjl bsf reterence uungeials-4a armature ib top plate- I 3,". reed lo -land, bottom ,ma,te. with screws of non-mag-netic .uorigntg'portionr of; the .U being Jogger! than {the-1 (holes: -1 1 f d 2 i i htned F to ,rigiguy 3 secure'these parts together. These screws are designated by reference numeral H in Fig. 1. It is to be understood that these assembly operations must be performed before the attachment of yoke IE to bracket 1. It will be noted that bracket I5 is provided with a hole l1 large enough so that yoke l5 may be slipped over the weight 21 on striker l0.

.The use of permanent magnet l and its location within the telephone ringer assembly as pictured form major features of my invention. Lookingat the permanent magnet in Fig. 3, the upper portion is one magnetic pole and the bottom portion isthe other magnetic pole. Consequently, when assembled as seen in Fig. 2, the magnetic flux produced by magnet I flows from the upper portion of magnet I, through armature 9, through the cores of the coils 23 and 24 in parallel, through the bracket 22 and back through bracket 1 (attached to bracket 22 by screw [8) to the lower portion of magnet I.

means including a flexible reed of magnetic material for mounting said armature in said above mentioned position; and a permanent magnet mounted between said armature and the portion of said bracket to which said other ends of said coils are attached.

4. In a telephone ringer; in combination; a yoke of non-magnetic material; a pair of magnet coils having cores attached at one end to said yoke and held in fixed parallel relation to each other; a bracket of magnetic material to which the other ends of said coils are attached; at least one ringer gong supported adjacent the ends of When the coils of the electromagnets are'energized from A. C. ringing current, the magnetic, flux produced thereby in one core aids that produced by magnet I, while the magnetic flux produced by the ringing current in the other core Opposes that produced by magnet I, thus rocking armature 9 back and forth on its reed suspension 26 for causing the weight 21 on the striker ID to strike the gongs. WhatIclaimis:

permanent magnet mounted Within said enclosure'between said armature and said bracket.

2 In a telephone ringer; in combination; a

pair 'of magnet cores; a yoke of non-'magnetic 2 material having a flat surface to which one, end

10f said cores are attached, said yoke having a pair of; extensions one on each side of said fiat surface. and extending at right angles thereto; a bracket of magnetic material attached to said extensions and cooperating therewith to form an enclosure; an armature of magnetic material flexibly supported within said enclosure; and a permanent magnet mounted within said enclosure between said armature and said bracket,

1 'saidbracket having an extension providing a magnetic circuit between said magnet and the 7 other end of said cores.

3. In a telephone ringer; in combination; a

yoke of non-magnetic material; a pair of magnet coils having cores attached at one end to said yoke and held in fixed parallel relation to each other; a bracket of magnetic material to which the other ends of said coils are attached; at least one ringer gong supported adjacent the ends of said coils which are attached to saidbracket; an elongated armature of magnetic material supported adjacent the ends of said cores which are attached to said yoke, said armature extending in a direction approximately at'right anglesto said cores with the ends of the armature coopcrating with the ends of said cores whereby each end of the armature alternately rocks back and forth with respect to the adjacent core; a striker operated'by said armature to' strikesaid. gong;

. mentioned position; and a permanent magnet said coils which are attached to said bracket; an elongated armature supported adjacent the ends of said cores which are attached to said yoke, said armature of magnetic material extending in a direction approximately at right angles to said cores with the ends of the armature cooperating with the endsof said cores whereby each end of the armature alternately rocks back and forth with respect'to the adjacentcore; a striker operated r by said armature to strike said gong; means including a flexible reed of magnetic material formounting said armature in said above mounted between said armature and the portion of said bracket to which said other ends of said coils are attached, said magnet having onepole adjacent said armature and the other 'pole adjacent said other ends ofsaid coils.

5. In a telephone ringer; in 'combination'ga yoke of non-magnetic material, said yokehaving a, flat surface and a pair of extensions, one, on each side of said 'flatsurface and extending at right angles thereto; a pair of magnet coils having cores attachedat one end to said yoke and held, in fixed parallel relation to each other; a firstbracket of magnetic material attachedto said extensions and cooperating therewith .to form an enclosure; a second magnetic bracket to .whichthe other ends of said coils are attached;

an elongated armature of magnetic material; means including a flexible reed of magnetic material for mounting aid armature within said enclosure adl'acent to the ends of said cores which are attached to said yoke, said armature extending in a direction approximately at right angles to said cores with the ends of said armature cooperating with the ends of said cores, whereby each end of the armature alternately rocks back and forth with respect to the adjacent core; .a striker operated by said armature to strike said gong; and a permanent magnet mounted within said enclosure betweensaid armature'and the portionof said bracket to which said other ends of said coils V are attached, said second. bracket having an extension providing a magnetic circuit between said magnet and the other end of said cores.

6. In a telephone ringer; in combination; a

. yoke of non-magnetic material, said yoke having a flat surface and a pair of extensions, one on each side of said flat surface and extending at right angles thereto; a pair of magnet coils having cores attached at one end to said yoke and held in fixed parallel relation to each other; a first bracket of magnetic material attached to said extensions and cooperating therewith to form an enclosure; asecond magnetic bracket to which the other ends of said coils are attached;-,-an elongated armature of magnetic material; means including a flexible reed of magnetic material for mounting said armature within said enclosure adjacent to the ends of said cores which are attached to said yoke, said armature extendingin a direction approximately at right angles to said cores with the ends of said armature cooperating with the ends of said cores, whereby each end of the armature alternately rocks back and forth with respect to the adjacent core; a striker 0perated by said armature to strike said gong; and a permanent magnet mounted within said enclosure between said armature and the portion of said bracket to which said other ends of said coils are attached, said second bracket having an extension providing a magnetic circuit between said magnet and the other end of said cores, said magnet having one pole adjacent said armature and the other pole adjacent said other ends of said coils.

GEORGE W. SCHOMAKER.

6 REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

